CyberPower's PFC Series UPS with pure sinewave output is the first to address the critical compatibility issues of non-Sinewave UPS products working with computing systems using Active PFC power supplies (ENERGY STAR 5.0 compliant). CyberPower's innovative PFC Series UPS is an affordable solution that ensures equipment utilizing Active PFC power supplies do not unexpectedly shutdown or experience harmful stress when switching from AC power to UPS battery power.